14a75a83ea
This patch makes Page.evaluate await promise if one is returned by the evaluated code. This makes the Page.evaluateAsync unneeded, so the patch removes it. Fixes #11.
91 lines
3.0 KiB
JavaScript
91 lines
3.0 KiB
JavaScript
/**
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* Copyright 2017 Google Inc. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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var helpers = module.exports = {
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/**
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* @param {!Connection} client
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* @param {string} url
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* @return {!Promise<?Object>}
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*/
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waitForScriptWithURL: function(client, url) {
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var fulfill;
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var promise = new Promise(x => fulfill = x);
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client.on('Debugger.scriptParsed', onScriptParsed);
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client.on('Debugger.scriptFailedToParse', onScriptFailedToParse);
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return promise;
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function onScriptParsed(event) {
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if (event.url !== url)
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return;
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client.removeListener('Debugger.scriptParsed', onScriptParsed);
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client.removeListener('Debugger.scriptFailedToParse', onScriptFailedToParse);
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fulfill(event);
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}
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function onScriptFailedToParse(event) {
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if (event.url !== url)
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return;
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client.removeListener('Debugger.scriptParsed', onScriptParsed);
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client.removeListener('Debugger.scriptFailedToParse', onScriptFailedToParse);
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fulfill(null);
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}
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},
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/**
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* @param {!Connection} client
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* @param {function()} fun
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* @param {!Array<*>} args
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* @param {boolean} awaitPromise
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* @param {string=} sourceURL
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* @return {!Promise<!Object>}
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*/
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evaluate: function(client, fun, args, awaitPromise, sourceURL) {
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var code = helpers.evaluationString(fun, args, awaitPromise, sourceURL);
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return helpers.evaluateText(client, code, awaitPromise);
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},
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/**
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* @param {!Connection} client
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* @param {string} text
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* @param {boolean} awaitPromise
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* @return {!Promise<!Object>}
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*/
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evaluateText: function(client, text, awaitPromise) {
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return client.send('Runtime.evaluate', {
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expression: text,
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awaitPromise: awaitPromise,
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returnByValue: true
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});
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},
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/**
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* @param {function()} fun
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* @param {!Array<*>} args
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* @param {boolean} wrapInPromise
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* @param {string=} sourceURL
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* @return {string}
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*/
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evaluationString: function(fun, args, wrapInPromise, sourceURL) {
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var argsString = args.map(x => JSON.stringify(x)).join(',');
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var code = `(${fun.toString()})(${argsString})`;
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if (wrapInPromise)
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code = `Promise.resolve(${code})`;
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if (sourceURL)
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code += `\n//# sourceURL=${sourceURL}`;
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return code;
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}
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};
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